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Wondering about what specifically? Slide on over to AFR's web site and check specs; send the seller some pointed questions after the AFR visit to satisfy ?s.
Can't tell whether 190s or 195; he mistates that chambers are 64cc but they come manufactured at 68cc (unless he's done some mods; the exhaust ports are 64cc though) go to: http://www.airflowresearch.com
Considering they're off a 383, my best is 195. However, I agree w/ what was said above. Best to ask the seller. (And he is also right about AFRs being manufactured as 68CC, but the heads could have been milled.)